50 000 000 000 Mark overprint on 5 000 000 Mark

By late 1923, German municipal emergency money — Notgeld — had entered its most absurd phase. Stadt Mannheim, like dozens of other cities, simply could not print new denominations fast enough to keep pace with hyperinflation, so existing lower-denomination stock was overprinted rather than discarded. This note is a product of that triage: a 5,000,000 Mark note rendered tenfold obsolete almost immediately, then stamped with a 50,000,000,000 Mark value to stay viable for perhaps another week of purchasing power.

The embossed municipal seal was the primary — arguably only — anti-counterfeiting measure, a thin guarantee of authenticity at a moment when the currency itself was worth almost nothing.